Cold Tandem Rolling Tension Control for Vibration Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-speed rolling processes in cold tandem rolling mills often result in vibration issues, leading to surface quality defects and reduced production efficiency, with existing solutions only addressing rolling stability and not effectively suppressing vibrations.
Innovation Solution
A tension system optimization method that calculates optimal inlet and exit tensions for each machine frame based on device and process parameters, using vibration determination indices to ensure stable lubrication states and minimize rolling mill vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed rolling process is adopted to increase productivity, then production efficiency is improved, but rolling mill vibration occurs leading to surface quality deterioration
Solution Approach 1:
The patent optimizes tension system parameters (inlet tension and exit tension) to suppress vibrations during high-speed rolling. By adjusting these tension parameters, the system maintains stable rolling conditions that prevent surface quality deterioration while preserving high productivity benefits
2Loss of time
If rolling speed is increased to reduce production time, then loss of time is reduced, but vibration occurs causing on-site shutdown for maintenance
Solution Approach 1:
The patent employs a vibration determination index that monitors rolling conditions and provides feedback to the tension control system. This feedback mechanism allows real-time adjustment of tension parameters to prevent vibrations that would cause shutdowns, thereby maintaining both high speed operation and equipment reliability
3Manufacturing precision
If tension system is optimized to suppress vibration, then surface quality is improved, but device complexity increases due to additional control parameters
Solution Approach 1:
The patent calculates and sets optimal inlet and exit tension values before the rolling process begins, based on predetermined vibration suppression criteria. This preliminary optimization eliminates the need for complex real-time control systems, achieving surface quality improvement through pre-planned parameter settings rather than complex active control
Data Source
AI summary
The application discloses a tension system optimization method for suppressing vibration of a cold tandem rolling mill. The method aims to suppress vibration occurring in a high-speed rolling process of a cold tandem rolling mill, and provides a rolling machine vibration determination index coefficient for effectively determining whether vibration occurs in a rolling machine. The method employs a target optimization function F(X) such that a mean square error between an optimal value ψ0i of the rolling machine vibration determination index and a vibration determination index ψi of each machine frame acquired in an actual rolling process is at a minimum, and such that a maximum value of the rolling machine vibration determination index coefficient of each individual machine frame is also at a minimum, employs a constraint in which an upper threshold ψi+ of the vibration determination index is acquired during a rolling process in an over-lubricated state in which a neutral angle γi coincides with a bite angle αi and a constraint in which a lower threshold ψi− of the vibration determination index is acquired during a rolling process in an under-lubricated state in which the neutral angle γi is half the bite angle αi, thereby ultimately optimizing a tension system of a rolling process of a cold tandem rolling mill.